Abstract
Disclosed herein is a system (10) for detecting the installation of an optical tap (12) on an optical fibre link (14). The system (10) comprises a spatial mode de-multiplexer (16) optically coupled to the optical fibre link (14). The spatial mode de-multiplexer (16) is configured to isolate an optical signal (18) in a first spatial mode (19) of the optical fibre link (14). The spatial mode de-multiplexer (16) is configured to isolate light (20) in a second spatial mode (21) of the optical fibre link (14). The system (10) comprises an optical sensor (22) optically coupled to the spatial mode de-multiplexer (16) for measuring the optical power of the light (20) in the second spatial mode of the optical fibre link (14). Also disclosed herein are methods for detecting installation of an optical tap and methods for securing an optical signal in an optical fibre.
| Original language | English |
|---|---|
| Patent number | WO2018027267 |
| IPC | H04B 10/85 2013.01,G02B 6/02 2006.01 |
| Priority date | 9/08/16 |
| Filing date | 9/08/17 |
| Publication status | Submitted - 15 Feb 2018 |
Bibliographical note
Designated States:AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)